Light Source Module Substrate Layout for Uniform Luminance
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Solution Overview
Problem
Existing lighting devices with integrated light emitting diodes (LEDs) face challenges in slimming and thinning due to complex assembly configurations, which restrict the arrangement of LEDs and result in non-uniform luminance.
Innovation Solution
A light source module design featuring a substrate with mounted light emitting device packages and driving devices, along with a connection terminal system where the interval between the connection terminals and the substrate ends is equal to or greater than the interval between the LEDs, allowing for flexible arrangement and improved heat dissipation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the light emitting module and driving module are assembled separately, then the driving function is reliable, but the device complexity increases and workability is reduced
Solution Approach 1:
The patent combines the light emitting module and driving module into a single integrated structure where the driving devices are mounted on the same substrate as the light emitting devices. This merging eliminates the need for separate assembly of two modules, reducing device complexity and improving workability while maintaining the reliable driving function through integrated circuit design.
Solution Approach 2:
The substrate serves multiple functions: it acts as the mounting platform for light emitting devices, the mounting platform for driving devices, and the interconnection medium between them. This multi-functionality reduces the overall component count and assembly complexity while ensuring reliable electrical connections for driving the LEDs.
2Reliability
If the light emitting module and driving module are assembled separately, then the driving function is reliable, but the device thickness increases making it difficult to slim and thin
Solution Approach 1:
By merging the driving module with the light emitting module onto a single substrate, the patent eliminates the need for stacked or side-by-side assembly of separate modules. This integration significantly reduces the overall device thickness, enabling slim and thin lighting devices while maintaining reliable driving functionality through compact circuit design.
3Length of stationary object
If the driving module is integrated with the light emitting module, then the device can be slimmed and thinned, but the arrangement of light emitting devices becomes limited
Solution Approach 1:
The patent segments the substrate into multiple independent mounting regions: one region for light emitting devices and another region for driving devices. This segmentation allows flexible arrangement of LEDs within their designated area while keeping the overall device thin, as the driving circuits occupy a separate zone that does not constrain LED placement patterns.
4Length of stationary object
If the driving module is integrated with the light emitting module, then the device can be slimmed and thinned, but the luminance uniformity becomes difficult to achieve
Solution Approach 1:
The patent applies local quality by creating distinct functional zones on the substrate: a light emitting device mounting region optimized for LED placement and a separate driving device region optimized for circuit layout. This spatial separation allows independent optimization of each zone, enabling flexible LED arrangement for uniform luminance distribution while maintaining thin device profile through integrated construction.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This design enables a slimmed, thinned, and uniformly lit lighting device with enhanced heat dissipation capabilities and a free design for LED arrangement, achieving better luminance control and efficiency.
Implementation Method 1
Light emitting devices are P-N junction diodes having a characteristic where electrical energy is converted into light energy
Implementation Method 2
a lower surface of the substrate of the light source module directly contacts an inner bottom of a lower cover, and thus, the lighting device has an advantage which is good in heat dissipation
Data Source
AI summary
A light source module according to an embodiment includes a substrate, a plurality of light emitting device packages disposed on the substrate, a plurality of driving devices disposed on the substrate, and a connection terminal part disposed on the substrate, wherein an interval between both ends of the substrate and the connection terminal part is equal to or greater than an interval between the light emitting device package adjacent to the both ends of the substrate and the both ends of the substrate. The light source module is advantageous to slimming and thinning and has an advantage where a design of arrangement of a light emitting device package is free.